Improvement in gages for augers



UNITED STATES PATENT OFFICE.

SAMUEL L. LYFORD, OIF` PORTLAND, MAINE.

IMPROVEMENT IN GAGS FOR AUGERS.

Specication forming part` of Letters Patent No. 55,132, dated May 29,1866.

To all whom it may concern:

Be it known that I, SAMUEL L. LYFORD, of Portland, in the county ofCumberland and State 0f Maine, have invented a new and useful Bit andAuger Gage; and I do hereby declare that the following is a full andexact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

The nature of my invention consists in applying to bits and angers ofall sizes a gage consisting` of two clamps fastened to the bit or augerby means of screws and movable at pleasure, thus exactly gaging ormeasuring the depth of the hole to be bored.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

lconstruct'my gage in two parts or clamps, as shown in the drawing,marked A A. These parts or clamps are joined or fastened together bymeans of screws marked B B.

A side view of the parts of the gage is shown as marked O.

lThis gage thus constructed is applied to the bit or auger, as shown inthe drawing, (marked D,) an d by loosening the screws maybe moved up ordown at pleasure, gaging accurately the depth required to be bored.

The clamp I construct of iron, brass, copper, or other suitable metal.

What I claim as my invention, and desire to secure by Letters Patent,is-

A gage for bits andaugers composed of two pieces, A A, formed to tit thefaces of the twisted blade ofthe bit or auger so as to turn with thespiral twist and adjustably united by set-screws, substantially asandfor the purpose set forth. l

SAMUEL L. LYFORD.

Witnesses:

JOSEPH B. HALL, P. P. REED.

